The American Homebrewers Association (AHA) started Learn to Homebrew Day back in 1999 as a way for homebrewers to share their hobby with non-brewing friends and family. This Saturday at hundreds of sites worldwide the tradition will be continued. Last year there were 360 registered sites in 47 states and 10 different countries that claimed to brew 6,284 gallons (23,787 liters) with nearly 6,000 participants.